Lift truck



Nov. 7, 1939.1

G. G. RAYMOND ET AL LIFT TRUCK Filed March 35; 1958 0,5 mm mm W m Mm am a W A w my 6 W Patented Nov. 7, 1939 PATENT OFFICE um 'raUcx George- G. Raymond and William 0. House, Greene, N. Y., asaignora to Lyon Iron Works, a corporation of New York Application March 25, 1988, Serial No. 198,130 14 Claims. (Cl. 280-44) This invention relates to lift trucksaiid more particularly to the type of lift truck disclosed in applicants copending application, Serialglflo. 164,- 540, filed September 18, 1937, entitled lift truck adapted for use with a two faced pallet.

One primary object of this invention is the provision of an improved lift truck for use with two faced pallets wherein there is provided a simple means for facilitating the insertion of the fork of the truck between the two faces of the pallet;

An additional object is the provision in conjunction with an uncounterweighted lift truck having an extensible and retractible member adapted to be passed through an aperture in the lower face of a two faced pallet or adapted to extend completely through such .a pallet, of means whereby the fork may readily ride over the lower face of the pallet either upon being inserted between the two faces thereof or withdrawn therefrom.

. A further and more specific object is the provision of a stepped means carried by the fork of a lift truck to substantially eliminate the necessity of lifting the end of the truck ofi of the floor to any extentwhen the same is passed over an edge of the lower face of a two faced pallet.

A still further object is the provision of a lift truck incorporating all the advantages mentioned in the above objects which may be readily used with a single faced pallet if desired.

A further object is the provision of a lift truck which may be readily used particularly in conjunction with a pallet of the type described in applicants co-pending application, Serial No. 164,541, filed September 18, 1937, entitled Pallet.

Other objects will in part be obvious and in part pointed out hereinafter.

The invention accordingly consists in the combination of elements, arrangement of parts and features of construction all as will be more fully pointed out hereinafter and disclosed in the accompanying drawing wherein:

Figure l is a top elevational view of a preferred form of lift truck in accordance with the present invention.

Figure 2is a side elevational view of the structure shown in Figure 1.

Figure 3 is a perspective view of a lift truck illustrated in Figures 1 and 2, shown as associated with a two-faced pallet.

Similar reference characters refer to similar parts throughout the several views of the draw- Having reference now to the drawing there is generally indicated at It a lift truck frame provided with an elevating wheel ll adjacent one end thereof and suitable lifting mechanism I 2, only generally shown here but more clearly il- 5 lustrated in our copending application Ser. No. 164,540 above referred to, to elevate frame 10 with respect to wheel ll. Frame It is provided with a pair of extending portions I 3, which by reference to Figure 3, are adapted to be inserted 10 between the two faces of a two faced pallet, for example, of the type shown in applicants above mentioned co-pending application, Serial No. 164,541, entitled Pallet. Inasmuch as the two extending portions l3 are substantially identical 15 they will hereinafter not be individually described.

An axially movable rod 14 actuated by said lifting mechanism passes through each of extending portions l3 and is secured incagh case to a bracket l5 pivoted as on a pivot l6. brackets I5 is provided with roller means I! and the arrangement is such that upon actuation of lift mechanism 12 and consequently elevation of frame 10 with respect to wheel Ii, bracket i5 is swung about pivot 16 in a clockwise direction as viewed in Figure 2 to move extending portions l3 upwardly with respect to rollers I1 and the floor surface generally designated at F" in Figure 2. Springs l8 serve normally to bias grackets l5 and rollers I 1 toward retracted posiso In the operation of such a lift truck, however, it has been found that, in order to maintain the thickness of extending portions l3- with such limits as to permit the ready passage between the 85 two faces of a two faced pallet either of the conventional type or the type disclosed in applicants above mentioned application entitled Pallet, rollers ll must extend a substantial distance below the bottom surface thereof, as shown in Figure 2. This under certain circumstances has hitherto necessitated a slight elevation of the end of the frame by the operator.

One object of this invention is, therefore, to provide a means whereby such elevation may be accomplished without material effort on the part of the operator and whereby the ends of the extending portions I! may be readily passed over the lower face of a pallet without occasioning any jar or bump to the truck mechanism. In

. order that this may be accomplished the ends of extending members I 3 opposite lift mechanism l 2, generally indicated at 20, are provided with a plurality of members 2|, 2! and 23 extending longitudinally with respect thereto. Each of Each of low said extending portions a distance less than said first mentioned roller, a third roller positioned adjacent said second roller in a direction away from said lifting means and extending a still lesser distance below said extending portions, and a fourth roller extending below said extend ing portions a distance less than the first mentioned roller and positioned adjacent thereto in a direction toward said lifting means.

7. In a lift truck, in combination, a frame, lifting means carried by an end of said frame, extending portions comprising a part of said frame and adapted for insertion between the faces of a two faced pallet, extensible and retractible members carried by said portions, each of said members including a, roller and extending when in retracted position a given distance below'said extending portion, a second roller positioned adjacent said first mentioned roller in a direction away from said lifting means and extending below said extending portions a distance less than said first mentioned roller, a third roller positioned adjacent said second roller in a direction away from said -lifting means and extending a still lesser distance below said extending portions, a fourth roller extending below said frame a distance less than the first mentioned roller and positioned adjacent thereto in a direction toward said lifting means, and a fifth roller extending below said extending portions a less distance than said fourth mentioned roller and positioned adjacent thereto in a direction toward said lifting means.

a. in a lift truck, in combination, a frame, lifting means carried by an end of said frame, ex-

tending portions comprising a part of said frame and adapted for insertion between the faces of a two faced pallet, extensible and retractible mem-- bers carried by said portions, each of said mem= here including a roller and extendingwhen in retracted position a given distance below said extending portion, and a plurality of roller means extending varying distances below said extending portions positioned adjacent said first mentioned rollers, those of said roller means extending the least distance below said extending portions being situated at points more remote from said first mentioned roller than those of said roller means extending a greater distance.

9. In a lift truck, in combination, a frame, lifting means carried by ahead of said frame, extending portions comprising a part of said frame and adapted for insertion between the faces of a two faced pallet, extensible and retractible members carried by said portions, each of said members including a roller and extending when in retracted position a given distance below said extending portion, and a plurality of roller means extending a varying distance below said extending portions positioned adjacent said first mentioned roller means in a direction away from said lifting means, those of said rollers extending the least distance below said extending portions being situated at points more remote from said first mentioned roller than those of said roller means extending a greater distance.

10. In a lift truck, in combination, a frame, lifting means carried by an end of said frame, extending portions comprising a partof said frame and adapted for insertion between the faces of a two faced pallet, extensible and re=- tractible members carried by said portions, each of said members including a roller and extending when in retracted position a given distance below said extending portion, and a plurality of roller means extending a. varying distance below said extending portions positioned adjacent said first mentioned roller means in a direction toward said lifting means, those of said rollers extending the least distance below said extending portions being situated at points more remote from said first mentioned roller than those of said roller means extending a greater distance.

11. In a lift truck, in combination, a frame. lifting means carried by an end of said frame, extending portions comprising a part of said frame and adapted for insertion between the faces of a two faced pallet, extensible and retractible members carried by said portions, each of said members including a roller and extending when in retracted position a given distance below said extending portion, and a plurality of roller means extending a varying distance below said extending portions positioned adjacent said first mentioned roller in opposite directions from said first mentioned roller means with respect to said lifting means, those of said rollers extend= ing the least distance below said extending portions being situated at points more remote from said first mentioned roller than those of said roller means extending a greater distance.

12. In a lift truck, in combination, a frame, an extensible and retractible member carried by an end of said frame, means to extend and retract said member carried by one end of said frame and roller means carried by said frame and positioned adjacent said member in a direction towards said means to extend and retract said member.

13. In combination with a lift truck having a frame including a portion adapted to be insertecl between the faces of a two faced pallet, means to elevate said frame, and extensible and retractible means adapted to extend into said pallet, for extension through or beyond the same, successive roller means so positioned as to provide successive relative slight lifting movement of the leading end of saidportion to facilitate introduction of the said portion into the space between said faces.

14. In combination with a lift truck having a.

frame including a. portion adapted to be inserted between the faces of a two faced pallet, means to elevate said frame, and extensible and retractible means adapted to extend into 'said pallet, for extension through or beyond the same, successive roller means so positioned as to provide successive relative slight lifting movement of the leading end of said portion to facilitate introduction of the said portion into. the space between said faces and successive roller means so positioned as to provide a relatively slight lifting movement of the end of said portions carrying said retractible and extensible means upon withdrawal of the same from said space.

GEORGE a. RAYMOND. wnmu o. noose. 

